Every coin what to have their own exchange and as many exchange is getting out same as new coins , now I see no reason for too much coin and exchange market as we are only here to play save in the mixed and get little profit we could but many has turn this to scam arena , that is why we see lots of them coming out every seconds with no purpose.
More coins mean more platforms but more exchange means nothing. When there was a big exchange that can list hundred of good coins and why do we need to use a new one? Some people argued if there must be a competition between a new one and then old platform but this time the growth of the new exchange site doesn't make sense at all.